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AD8347ARU

更新时间： 2024-11-08 22:50:03

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
20页	746K
描述
0.8 GHz-2.7 GHz Direct Conversion Quadrature Demodulator

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替代型号

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AD8347ARU 数据手册

0.8 GHz–2.7 GHz

Direct Conversion Quadrature Demodulator

AD8347^*

FEATURES

FUNCTIONAL BLOCK DIAGRAM

Integrated RF and Baseband AGC Amplifiers

Quadrature Phase Accuracy 1؇ Typ

I/Q Amplitude Balance 0.3 dB Typ

Third Order Intercept (IIP3) +11.5 dBm @ Min Gain

Noise Figure 11 dB @ Max Gain

AGC Range 69.5 dB

Baseband Level Control Circuit

Low LO Drive –8 dBm

ADC Compatible I/Q Outputs

Single Supply 2.7 V–5.5 V

AD8347

LOIN

VPS1

IOPN

IOPP

VCMO

IAIN

28 LOIP

PHASE

SPLITTER

27 COM1

26 QOPN

25 QOPP

PHASE

SPLITTER

QAIN

COM3

QMXO

VPS3

VDT1

VAGC

VDT2

VGIN

COM3

IMXO

COM2

RFIN

RFIP

Power-Down Mode

Package 28-Lead TSSOP

DET

VPS2

IOFS

VREF

APPLICATIONS

Cellular Basestations

Radio Links

QOFS

ENBL

GAIN

CONTROL

BIAS

Wireless Local Loop

IF Broadband Demodulator

RF Instrumentation

Satellite Modems

GENERAL DESCRIPTION

amplifiers together provide 69.5 dB of gain control. A precision

control circuit sets the Linear-in-dB RF gain response to the gain

control voltage.

The AD8347 is a broadband Direct Quadrature Demodulator

with RF and baseband Automatic Gain Control (AGC) amplifiers.

It is suitable for use in many communications receivers,

performing Quadrature demodulation directly to baseband

frequencies. The input frequency range is 800 MHz to 2.7 GHz.

The outputs can be connected directly to popular A-to-D converters

such as the AD9201 and AD9283.

Baseband level detectors are included for use in an AGC loop to

maintain the output level. The demodulator dc offsets are

minimized by an internal loop, whose time constant is controlled

by external capacitor values. The offset control can also be

overridden by forcing an external voltage at the offset nulling pins.

The RF input signal goes through two stages of variable gain

amplifiers prior to two Gilbert-cell Mixers. The LO quadrature

phase splitter employs polyphase filters to achieve high quadra-

ture accuracy and amplitude balance over the entire operating

frequency range. Separate I & Q channel variable-gain amplifiers

follow the baseband outputs of the mixers. The RF and baseband

The baseband variable gain amplifier outputs are brought off-chip

for filtering before final amplification. By inserting a channel

selection filter before each output amplifier high-level out-of-

channel interferers can be eliminated. Additional internal circuitry

also allows the user to set the dc common-mode level at the

baseband outputs.

*U.S. Patents Issued and Pending

REV. 0

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat

may result from its use. No license is granted by implication or otherwise

under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

Fax: 781/326-8703

www.analog.com

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AD8347ARU 替代型号

型号	品牌	替代类型	描述	数据表
AD8347ARUZ	ADI	类似代替	0.8 GHz to 2.7 GHz Direct Conversion
AD8347ARU-REEL	ADI	类似代替	0.8 GHz-2.7 GHz Direct Conversion Quadrature Demodulator

与AD8347ARU相关器件

型号	品牌	获取价格	描述	数据表
AD8347ARU-REEL	ADI	获取价格	0.8 GHz-2.7 GHz Direct Conversion Quadrature Demodulator
AD8347ARU-REEL7	ADI	获取价格	0.8 GHz-2.7 GHz Direct Conversion Quadrature Demodulator
AD8347ARU-REEL7	ROCHESTER	获取价格	800 MHz - 2700 MHz RF/MICROWAVE QUADRAPHASE DEMODULATOR, MO-153AE, RU-28, TSSOP-28
AD8347ARUZ	ADI	获取价格	0.8 GHz to 2.7 GHz Direct Conversion
AD8347ARUZ	ROCHESTER	获取价格	800MHz - 2700MHz RF/MICROWAVE QUADRAPHASE DEMODULATOR, MO-153AE, RU-28, TSSOP-28
AD8347ARUZ-REEL7	ADI	获取价格	0.8 GHz to 2.7 GHz Direct Conversion
AD8347ARUZ-REEL7	ROCHESTER	获取价格	800MHz - 2700MHz RF/MICROWAVE QUADRAPHASE DEMODULATOR, MO-153AE, RU-28, TSSOP-28
AD8347-EVAL	ADI	获取价格	0.8 GHz-2.7 GHz Direct Conversion Quadrature Demodulator
AD8348	ADI	获取价格	50-1000 MHz Quadrature Demodulator
AD8348ARUZ	ADI	获取价格	50 MHz to 1000 MHz Quadrature Demodulator

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